HELP CODE 43

hey fellas i need help with code 43 and how do i fix it and what ever it needs to be done HELP ME

Code 43 is Fuel System Voltage: The ECU is unable to monitor the battery voltage most likely an open circuit in the line to the ECU.

i took off the dcm and found oil inside the gray plug is this normal and it looked clean b 4 i took it off.cleaned it out but havent run my apex yet.

Yamaha Error Codes for Apex, Attak, and Apex Mountain models


Code #
Item
Symptom
Fail-Safe Action Starting Capability Running Capability
11 Cylinder identification sensor No normal signals are received from the cylinder identification sensor Continues to operate the engine based on the results of the cylinder identification that existed up to that point Unable Able
12 Crankshaft position sensor No normal signals are received from the crankshaft position sensor Stops the engine (by stopping the injection and ignition) Unable Unable
13
14 Intake air pressure sensor (open or short circuit) (pipe system) Intake air pressure sensor-open or short circuit detected.
Faulty intake air pressure sensor system Fixes the intake air pressure to 85.0 kPa. Able Able
15
16 Throttle position sensor (open or short circuit) (stuck) Throttle position sensor-open or short circuit detected Fixes the throttle position sensor to fully open Able Able
20 Intake air pressure
Atmospheric pressure Defective values are detected due to the internal malfunction Fixes the intake air pressure and atmospheric pressure to 85.0 kPa. Able Able
21 Coolant temperature sensor Coolant temperature sensor-open or short circuit detected Fixes the coolant temperature to 600 C. After the engine starts, the radiator fan relay will be turned on. Able Able
22 Intake temperature sensor Intake temperature sensor-open or short circuit detected Fixes the intake temperature to 00 C. Able Able
23 Atmospheric pressure sensor (open or short circuit) Atmospheric pressure sensor-open or short circuit detected Fixes the atmospheric pressure to 85.0 kPa. Able Able
30 Oil pressure dropped Engine stops when the oil pressure drop is detected Fuel pump and fuel injection are stopped (main relay is off) Unable Unable
33
34
35
36 Faulty ignition Open circuit detected in the primary lead of the ignition coil Cut the injection of cylinder in the same group with the cylinder that the error is detected. Example, when the #1 cylinder is defective, cut the injection of #1 and #4 cylinders. Turn on the power to the air induction solenoid to always cut-off the aire Able (depending on the number of faulty cylinders) Able (depending on the number of faulty cylinders)
42 Speed sensor No normal signals are received from the speed sensor Assumes highest ratio Able Able
43 Fuel system voltage (monitor voltage) The ECU is unable to monitor the battery voltage (an open circuit in the line to the ECU) Fixes the battery voltage to 12 V Able Able
44 Error in writing the amount of CO adjustment on the EEPROM An error is detected while reading or writing on the EEPROM (CO adjustment value) n/a Able Able
46 Vehicle system power supply (monitor voltage) Power supply to the FI system is not normal Grip warmer output is off Able Able
50 ECU internal malfunction (memory check error) Faulty ECU memory. When this malfunction is detected, the code number might not appear on the meter n/a Unable Unable
80 Grip warmer switch Grip warmer switch-short circuit detected n/a Able Able
81 Grip warmer Grip warmer-open or short circuit detected n/a Able Able
82 Thumb warmer switch Thumb warmer switch-short circuit detected n/a Able Able
83 Thumb warmer Thumb warmer-short circuit detected n/a Able Able
84 T.O.R.S. Detecting conditions for T.O.R.S. are satisfied n/a Able Unable
85 Oil pressure switch Oil pressure switch-open circuit detected n/a Able Able
- Start unable warning Relay is not turned ON even if the crank signal is input while the start switch is turned ON. When the start switch is turned ON while an error is detected with the fault code of number 11, 12, 30, or 50. Engine trouble warning light flashes when the start switch is turned on Unable Unable

snoman said:

i took off the dcm and found oil inside the gray plug is this normal and it looked clean b 4 i took it off.cleaned it out but havent run my apex yet.

Click to expand...

Is your airbox full of oil? Any oil in the "belly pan" area? Maybe you have a leak. My oil tank started to crack and leak. Oil got everywhere.

When you turn the key does the fuel pump energize? If not and the sled won't turn over, you have a short in the ground. Mine did the same thing this year. Check the wiring harness along the left side frame above the primary clutch. Seems to be a popular spot for a ground wire break.

the pump does not energize when i turnt he key on when i tore every thing off and took a break it pumped but it did it once and puting the damn rubber seal sux as hell thanks for the info where the ground is i'll check it out later on today.

oh k fellas i jiggled my wiring above pto side and the mtor ran.but i dont know what color the wire is does any body know the wire i suppose to check thanks for ur replies.

the ground wire should be a black wire usually

heres what caused my apex code 43.the wire melted and burned and i dont know what caused it to melt and fuse to other wires ok here it goes i had to open up bunch of ground wires on the left side of harness and fix the problem.if ya'll have code 43 heres a pic of open wire on pto side left side of small box of grounds.

Snoman,
Glad you got her fixed. Same exact thing in the same exact spot as mine did.
Unfortunately mine did it on day 1 of a weeks ride in Ontario. Pretty tough to fix on the trail. I had to hitchhike 80 miles back to the hotel and rode double on my bride's Vector for the next 780 miles.
Those who have some time before next season should check this spot to see if your's are starting to do the same thing.

Glad to hear everything back up man,
Same thing happened to My Phazer
They had to replace the whole wiring harness,
took two months just because t was the frist phazer
it happened to the mechanic that worked on it said
that he was suprised it got as many Km's on it as it had

If the wire did melt,I would change the pump relay just to be safe.